Add better description to encrypted protocol messages

[NicoleYarroch]

Bug Report

Add better description to encrypted protocol messages. Currently the description prints:

Sending protocol message: Encrypted header, description overflows

But this is inaccurate because the header itself is not encrypted. Instead the header should be printed with a message saying that a description of the payload can not be printed because it is encrypted.

A better description would be

Sending protocol message: Version:5, encrypted:1, frameType:Single(1), serviceType:11, frameData:Reserved(0), sessionID:1, dataSize:237, messageID:147, Payload is encrypted - no description can be provided

Reproduction Steps

1. Connect a video streaming app configured to stream encrypted video to sdl_core
2. Check debug logs

Expected Behavior

The header should be printed for the protocol message.

Observed Behavior

The header is not printed for the protocol message.

OS & Version Information

• iOS Version: n/a
• SDL iOS Version: 6.3
• Testing Against: n/a